Littelfuse 0229007.H Glass Cartridge Fuse 7A 125VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0229007.H is a 7 A, 125 V AC glass cartridge fuse in the 2AG package format (5mm x 15mm). This component is classified as obsolete, requiring identification of active equivalent alternatives for continued system support. The fuse operates with slow-blow response characteristics and is designed for applications requiring holder-based mounting. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and enhanced compliance certifications.

Key Parameters

Parameter	Value
Current Rating	7 A
Voltage Rating (AC)	125 V
Fuse Type	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm
Response Time	Slow Blow
Breaking Capacity @ Rated Voltage	400 A
Melting I²t	464
Operating Temperature Range	-55°C to 125°C
DC Cold Resistance	0.0115 Ohms
Mounting Type	Requires Holder

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

Current Rating: 7 A (exact match required)
Voltage Rating (AC): 125 V (exact match required)
Package / Case: 2AG, 5mm x 15mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Breaking Capacity @ Rated Voltage: 400 A (exact match required)
Melting I²t: 464 (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)
Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these criteria and are manufactured by Littelfuse Inc. within Series 229. The primary distinction between the main part and substitutes is product status (obsolete versus active) and compliance certifications.

Parameter Comparison

Parameter	0229007.H	0229007.HXP	0229007.HXSP	0229007.MXP	0229007.MXSP	0229007.VXP	0229007.VXSP
Current Rating (A)	7	7	7	7	7	7	7
Voltage Rating - AC (V)	125	125	125	125	125	125	125
Voltage Rating - DC (V)	—	125	125	125	125	125	125
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Breaking Capacity @ Rated Voltage (A)	400	400	400	400	400	400	400
Melting I²t	464	464	464	464	464	464	464
Operating Temperature Range	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
DC Cold Resistance (Ohms)	0.0115	0.0116	0.0116	0.0116	0.0116	0.0116	0.0116
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	cUL, METI	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL

Engineering Selection Recommendations

All substitute parts are electrically and mechanically equivalent to the 0229007.H. Selection among active alternatives is based on the following factors:

Product Status: All substitute parts carry active product status, ensuring continued availability and manufacturing support. The original 0229007.H is obsolete and should be replaced in new designs and procurement.

Compliance Certifications: Substitute parts hold CE, CSA, PSE, and UL certifications, providing broader regulatory coverage compared to the original part's cUL and METI approvals. This expanded certification portfolio supports deployment across multiple geographic markets and application standards.

RoHS Compliance: All substitute parts are ROHS3 compliant, meeting current environmental and hazardous substance restrictions. The original part is RoHS non-compliant and may face procurement restrictions in regulated applications.

DC Voltage Rating: Substitute parts are rated for 125 V DC in addition to 125 V AC, providing enhanced flexibility for dual-voltage applications. The original part specifies AC voltage only.

Inventory Availability: Substitute parts maintain active inventory levels ranging from 716 to 2109 units, ensuring supply continuity. The original part has 1085 units in stock but is subject to obsolescence.

For new designs and system replacements, 0229007.MXP is recommended based on highest inventory availability (2109 units). For existing systems requiring direct substitution, any of the listed alternatives provide equivalent performance and enhanced compliance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 0229007.H with any of the listed substitute parts?

A: Yes. All substitute parts are electrically and mechanically equivalent. They share identical current ratings (7 A), voltage ratings (125 V AC), package dimensions (2AG, 5mm x 15mm), response characteristics (slow-blow), and thermal operating ranges (-55°C to 125°C). Direct substitution in existing holders is supported.

Q: What is the difference between the substitute part numbers?

A: The substitute parts differ only in packaging designation and internal manufacturing specifications (indicated by suffix variations: HXP, HXSP, MXP, MXSP, VXP, VXSP). All maintain identical electrical performance and mechanical compatibility. The suffix designations reflect different production batches or packaging configurations but do not affect functional equivalence.

Q: Why should I replace the obsolete 0229007.H?

A: The original part is classified as obsolete, indicating discontinued manufacturing and eventual supply exhaustion. Substitute parts are active products with ongoing manufacturing support. Additionally, substitutes offer ROHS3 compliance, expanded certifications (CE, CSA, PSE, UL), and 125 V DC rating capability, providing regulatory alignment with current standards.

Q: Are there any performance differences in DC applications?

A: The original 0229007.H is rated for AC voltage only. Substitute parts are rated for both 125 V AC and 125 V DC. If your application requires DC operation, substitute parts provide this capability. For AC-only applications, performance is identical.

Q: Which substitute part should I select for new procurement?

A: Selection can be based on inventory availability and packaging preference. 0229007.MXP offers the highest inventory level (2109 units). All alternatives provide equivalent electrical and mechanical performance. Consult your supplier for lead time and availability in your required packaging format.

Q: Is the DC cold resistance difference (0.0115 vs 0.0116 Ohms) significant?

A: No. The difference of 0.0001 Ohms is negligible and falls within normal manufacturing tolerance for fuse elements. This variation does not affect circuit performance or protection characteristics.

Q: Can I use these fuses in applications rated for higher voltages?

A: No. These fuses are rated for 125 V AC / 125 V DC maximum. Use only in circuits operating at or below these voltage levels. Exceeding rated voltage may result in fuse failure or hazardous conditions.

Q: What holder types are compatible with these 2AG fuses?

A: These fuses require a 2AG-format holder. Verify your existing holder is rated for 2AG cartridge fuses (5mm x 15mm dimensions). Holders designed for other fuse formats (1AG, 3AG, etc.) are not compatible.

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